package com.zjz.CoAndSE_DEMO;

import com.zjz.pojo.Person;

import javax.servlet.ServletException;
import javax.servlet.http.*;
import java.io.IOException;
import java.util.Collections;

public class SessionDemo01 extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        //解决乱码问题
        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("utf-8");
        resp.setContentType("text/html;charset=utf-8"); //

        //得到Session
        HttpSession session = req.getSession();
        //给Session中存东西
        session.setAttribute("name",new Person("zjz",22));
        //获取session的ID
        String sessionId = session.getId();

        //判断Session是不是新创建的
        if (session.isNew()) {
            resp.getWriter().write("session创建成功，ID：" + sessionId);
        }else {
            resp.getWriter().write("session已经在服务器注册,ID：" + sessionId);
        }

        //Session创建的时候做了什么事情：
        Cookie jsessionid = new Cookie("JSESSIONID", sessionId);
        resp.addCookie(jsessionid);



    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

    }
}
